In practice, the frequency range and frequency response of audio systems have always been a topic of interest. However, due to the specialized nature of the field, many people tend to have a limited or one-sided understanding of these concepts. What exactly is the difference between frequency range and frequency response? Is a higher frequency always better for sound quality? And how high can sound frequencies go?
**Understanding Frequency Range and Frequency Response**
The term "frequency range" refers to the range of frequencies that an audio system can effectively reproduce, from the lowest to the highest. On the
other hand, "frequency response" describes how a speaker reacts when a constant voltage signal is applied. It shows how the sound pressure level (in decibels) changes with frequency, along with any phase shifts that may occur. This relationship between sound pressure, phase, and frequency is known as the frequency response, measured in decibels (dB).
**Measuring the Frequency Characteristics of a Sound System**
Sound system performance is often illustrated using a graph where the vertical axis represents sound pressure in decibels, and the horizontal axis shows frequency on a logarithmic scale. When the sound output drops by 3 dB from its normal level, those points are referred to as the upper and lower cutoff frequencies. The range between these two points is known as the frequency response of the device. The curves representing sound pressure and phase shift against frequency are called the amplitude-frequency and phase-frequency characteristics, respectively. These are key indicators of speaker performance, directly affecting sound quality and price. A flatter frequency response curve (with smaller decibel variations) means less distortion and better overall performance.
For example, a speaker with a frequency response of 60 Hz to 18 kHz ± 3 dB is considered to have good sound quality. Sometimes, the terms "frequency range" and "frequency response" are used interchangeably, though they are not exactly the same.
**How High Can Sound Frequencies Go?**
In theory, a frequency range of 20 Hz to 20,000 Hz is sufficient for human hearing. However, sounds below 20 Hz may not be audible but can still be felt, such as the deep bass in music. To accurately reproduce all musical elements and speech, audio equipment must aim for high fidelity. This means extending both the lower and upper frequency limits beyond the standard range. For instance, FM stereo broadcasts in Europe have a frequency response of 40 Hz to 15,000 Hz with a tolerance of ±2 dB, while professional recording studios require even wider ranges. CD players typically support up to 20,000 Hz, and their low-end capabilities can go down to just a few Hertz, contributing to their excellent sound quality.
**Is a Wider Frequency Range Always Better?**
While a wider frequency range generally improves sound quality, this isn't always the case, especially for mid-range multimedia speakers. In product specifications, you often see terms like "system frequency response" and "amplifier frequency response." It's important to note that "system frequency response" is usually narrower than the "amplifier frequency response," so labeling only the latter can be misleading. Many manufacturers exaggerate the low-end frequency range, which can be misleading for consumers. For example, some domestic speakers claim to go as low as 40 Hz, while high-end international Hi-Fi speakers also typically start around 40–50 Hz. This makes it clear that not all claims are accurate.
When choosing multimedia speakers, it’s more practical to focus on their ability to reproduce mid- and high-frequency sounds, which are most important for music, voice, and sound effects in games and movies. If you're looking for a cinematic experience, a dedicated subwoofer will provide the deep bass you need without relying solely on exaggerated frequency range claims.
Sound module
Ningbo AST Industry Co.,Ltd has 17 Years Experiences to produce the Recordable sound module, sound module, sound chip, voice module, recordable sound chip,Musical module and other electronic modul. we can assure you of competive price,high quality,prompt delivery and technology supporting.
1. Sound Module Application:
Sound Module is one kind of electronic product which
mainly applied for Greeting cards,Christmas cards, promotion gifts, kids
books, newspapers, magazines or other products which have sounds.
2. Sound Module Classification:
We can produce different sound modules which have different functions:
A. Pre-record Sound Module ----The clients will
provide their sound files to us as MP3 or Wav Format,Then we programme
them into the Sound module,it will play the customized message.
The sound file can be from 1second to 480seconds
B. Recordable Module ---also called Self-recording
sound chip,we can record our own messages and playback them. Of
course,the message can be erased and re-recorded.
Recording time:6seconds,10seconds,20seconds,30seconds,60seconds,90seconds,120seconds,180seconds etc
C. Melody module --Which can play the Melody of the Happy Birthday,Merry Christmas,Slient Night and so on.
D. USB MP3 Module ---We Can download the
songs,musics,sentences,voice,advertising language from PC directly.
Which support SD Cards,TF Cards,U Disk and FM.LCD Display also can be
made
E. Programmable Voice Module --Also can be called DIY
Sound Chip,We provide the software and Programable Machine and the
Clients can be programmed them at their office,factory or Home. Which is
much suitable to small order quantity,but Prompt delivery order.
F. Waterproof Music Module --which usually are used by Children Cloths,Kids'Bib ,attract the children's attention or Sing the children's songs.
3. Sound Quality:Clearly and Loudly ( 16Khz Sampling Rate)
4. Activated way:
1) Pull String -- Pull the string to activate the sound.
2) Slide tongue,usually was used by greeting cards,open the cards,it will play the message automatically.
3) Push buttons--press the button to play the message/audio/music
4) Light sensor,usually was used by Gift box,newspaper. Open the Box or newspaper to play the message
5) vibration sensor,Move or shake it to play the customized audio
6) shadow sensor,if somebody walks front it,it will play the message.
7) Motion sensor,usually was used by Pop Display, advertising board
and so on.when somebody walks front it,it will play the message.
8) PIR (Infrared sensor),usually was used by Pop Display, advertising board and so on.when somebody walks front it,it will play the message.
5. Long Lifespan
6. Speaker:21mm,27mm,29mm,36mm,40mm,57mm etc. Plastic or Metal
7. Battery:AA, AAA, AG13, AG10, AG3 and so on environmental
8. PCB available: customize size or our existed standard size
9. PCB:Customized Size (OEM or ODM) or our existed standard size
10. Certification:CE ,Rohs
11. Export to: USA, UK,Canada,Germany,
Turkey,Russia,Poland,Switzerland,Netherland ,Frence Hungary
,Australia,New Zealand, Brazil, Columbia,Argentina,Thainland,Singapore ,
Malaysia and so on
Sound Module, Recordable Sound Chip, Recordable Sound Module
AST Industry Co.,LTD , https://www.astsoundchip.com
